Experimental validation of an analytical condensation model for the improvement of steam turbine design regarding flexibility requirements

Authors

Florian Felix Lapp - University Duisburg-Essen Chair of Turbomachinery Prof.Dr-Ing. Dieter Brillert
Sebastian Schuster - University Duisburg-Essen Chair of Turbomachinery Prof.Dr-Ing. Dieter Brillert
Simon Hecker - Siemens AG
Dieter Brillert - University Duisburg-Essen Chair of Turbomachinery Prof.Dr-Ing. Dieter Brillert

Abstract

This paper presents experimental data of shear stress-driven liquid water films on a horizontal plate formed by condensation of superheated steam. The experimental results have been gained in the Experimental Multiphase Measurement Application EMMA at the University of Duisburg-Essen. The liquid film thickness is investigated spatially and temporally with an optical measurement system. Furthermore, the resulting heat transfer coefficient in the case of film condensation is determined for a variety of steam velocities, temperature and pressure levels. Subsequently, the presented data is compared to the results of the analytical condensation model for shear stress-driven liquid films. Disparities between model and experiment as well as the range of validity are discussed. The presented results are an important contribution to the understanding of steady state single component multiphase flow considering phase change phenomena including heat transfer coefficients.